Help with SE Theme Creator

Posted by chucken
I installed SE Theme Creator Beta 9 a couple of weeks ago and now I need some help. My first theme did not work at all in the phone but after some work I found out that it was because all images used were in the JPG format (which should work according to the manual). So I converted everything to gif and it worked fine. After some time though, I changed some of the images, the subkeys and highlight in photoshop (changed brightness) and suddenly those two images would not show up in the phone! The theme works but those to images will not show. So my question is, are the images in a bad format? Could I save them in some other compression etc in photoshop to get them to work again?